I've always wondered how something like this could work, and thankfully the internet, or, more specifically, a video artist named Anthony Discenza, has provided. You're watching three Charlton Heston films -- Planet of the Apes, Soylent Green and Omega Man (recently remade as I Am Legend) -- alternated every tenth of a second, while the soundtracks are layered on top of one another. While I'd have to read an artist's statement to figure out the actual meaning of the piece, I enjoy it alone as a cacophonous video tech exercise.
My longtime friend Robyn Hasty (a.k.a. street artist Imminent Disaster) currently has a Kickstarter going for her upcoming project Homeland. Listen/watch her explain it in the video below, and consider contributing a few bucks if you'd like to help make it possible: